What’s Vulnerable › Vulnerabilities

CVE-2023-2834: BookIt <= 2.3.7 - Authentication Bypass

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-30 · updated 2026-06-17
• Weakness: CWE-288

Description

The BookIt plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.3.7. This is due to insufficient verification on the user being supplied during booking an appointment through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email.

Affected products

• stellarwp Bookit — Booking & Appointment Calendar: through 2.3.7

References

• https://lana.codes/lanavdb/0dea1346-fd60-4338-8af6-6f89c29075d4/
• https://plugins.trac.wordpress.org/browser/bookit/tags/2.3.6/includes/classes/CustomerController.php#L27
• https://plugins.trac.wordpress.org/browser/bookit/tags/2.3.6/includes/classes/database/Customers.php#L63
• https://plugins.trac.wordpress.org/changeset/2919529/bookit
• https://plugins.trac.wordpress.org/changeset/2925153/bookit
• https://www.wordfence.com/blog/2023/06/stylemixthemes-addresses-authentication-bypass-vulnerability-in-bookit-wordpress-plugin/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/cfd32e46-a4fc-4c10-b546-9f9da75db791?source=cve
• https://lana.codes/lanavdb/0dea1346-fd60-4338-8af6-6f89c29075d4/
• https://plugins.trac.wordpress.org/browser/bookit/tags/2.3.6/includes/classes/CustomerController.php#L27
• https://plugins.trac.wordpress.org/browser/bookit/tags/2.3.6/includes/classes/database/Customers.php#L63
• https://plugins.trac.wordpress.org/changeset/2919529/bookit
• https://plugins.trac.wordpress.org/changeset/2925153/bookit

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